American T-H3-DV-N 1**
American T-H3-DV-N 1** is in the DOE listing as of Oct 19, 2026.
- Gas tankless water heater
- 8 listed models
Not listed as ENERGY STAR certified on Oct 19, 2026.
Its figures are also listed under A. O. Smith T-H3-DV-N 1**.
Certified and advertised figures
- Flow at a 67°F rise
- 5.8gallons per minuteCertified
- Advertised flow
- 5.8gallons per minuteAmerican, at a 67°F rise
- UEF
- 0.93Uniform energy factor
Your fixtures at once
Change your hour and flowFlow where you live
Colder incoming water needs a bigger rise, so the heater gives less flow.
- Cold water
- Cold water must be at least 10°F colder than the hot water setting.
- Flow estimate
- The estimate uses the lowest certified flow among the listed models. It is about 5.6 gal/min at a 70°F rise.
Flow limits
- The estimate excludes the flow needed to turn the heater on, heat lost in pipes, and installation.
- Cold water from a well or long pipe run can differ from the temperature you enter.
- Without a stated flow limit, estimates for warmer water may exceed the heater’s actual flow.
Advertised and certified figures
| Figure | Advertised | Certified | Advertiser | Read |
|---|---|---|---|---|
| UEF | 0.93 | 0.93 | American | Read Oct 4, 2026 |
| Flow | 5.8 gal/min at a 67°F rise | 5.8 gal/min at a 67°F rise | American | Read Oct 4, 2026 |
Certified figures by listed model
| Model number | UEF | Flow at a 67°F rise (gal/min) | Recovery efficiency | Draw pattern |
|---|---|---|---|---|
| GT-540-NIH 1** | 0.93 | 5.8 | 96% | High |
| GT-540-PIH 1*1 | 0.93 | 5.8 | 96% | High |
| GT-540P-NIH 1** | 0.93 | 5.8 | 96% | High |
| GT-540P-PIH 1*1 | 0.93 | 5.8 | 96% | High |
| GT-540X3-NIH 1** | 0.93 | 5.8 | 96% | High |
| GT-540X3-PIH 1*1 | 0.93 | 5.8 | 96% | High |
| MCT-199I-N 1** | 0.93 | 5.8 | 96% | High |
| MCT-199I-P 1*1 | 0.93 | 5.8 | 96% | High |
UEF is the uniform energy factor. A dash means the model has no such figure.
It warms 5.8 gallons per minute of water from 58°F to 125°F in the test. The median flow among gas tankless models is 4.8 gallons per minute. Of 487 gas tankless models, 26 have a higher flow than this one.
As of Oct 19, 2026, it was not listed as ENERGY STAR certified. In tests, 93% of the energy it uses ends up as hot water (UEF 0.93). Its test simulated a day of high hot water use (its draw pattern). Of 399 gas tankless models with the same draw pattern, 196 have a higher UEF and 179 a lower one. For its type and draw pattern, its UEF sits at the median. While it heats water, 96% of the energy used goes into the water (its recovery efficiency).
A tag or quote may show any of its 8 model numbers. All of its test figures are shared by 7 other basic models. They are listed under 7 other brands, one each. For the full group, see the A. O. Smith T-H3-DV-N 1** page.
It may qualify for 2 rebate programs in 2 states. Another 2 rebate programs may accept it if it meets their other terms.
Also listed as
They carry every figure in the table above.
Rebates
| Program | State | Status | Program page |
|---|---|---|---|
| SoCalGas High-Efficiency or ENERGY STAR Certified Natural Gas Tankless Water Heaters rebate | CA | May qualify if it meets the other terms | Its own page |
| Xcel Energy MINNESOTA RESIDENTIAL ENERGY EFFICIENCY PROGRAMS (gas storage, gas tankless) | MN | May qualify | Its own page |
| PSE&G Tankless Water Heaters | NJ | May qualify | Its own page |
| Focus on Energy (gas tankless) | WI | May qualify if it meets the other terms | Its own page |
Programs change their terms. Check the program's own page before you buy.
- Every American basic model
- Every gas tankless water heater certified at 5.0 to 5.9 gallons per minute
- Every gas tankless water heater
- The most-searched gas tankless models side by side
Not covered
- Changes to an advertised figure after the date beside it.